public async Task Concurrency_RowOldCopy_MustNotUpdate()
{
if (!_tables.HasOptimisticConcurrency)
{
return;
}
//insert one row
var row = new TableRow("pk", "rk")
{
["c"] = "1"
};
await _tables.InsertAsync(_tableName, new TableRow[] { row });
Assert.NotNull(row.Id.ConcurrencyKey);
//update with a new value
var row1 = new TableRow("pk", "rk")
{
["c"] = "2"
};
await _tables.MergeAsync(_tableName, new TableRow[] { row1 });
Assert.NotNull(row1.Id.ConcurrencyKey);
Assert.NotEqual(row.Id.ConcurrencyKey, row1.Id.ConcurrencyKey);
//now use the first row (old ETag) to set the new value
row["c"] = "2";
await Assert.ThrowsAsync <StorageException>(() => _tables.UpdateAsync(_tableName, new TableRow[] { row }));
await Assert.ThrowsAsync <StorageException>(() => _tables.DeleteAsync(_tableName, new TableRowId[] { row.Id }));
}